On Wed, Jan 24, 2018 at 03:06:58PM +0100, Franky Van Liedekerke wrote:
> ​Hi,
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> we saw a lot of queries for uidnumber=4294967295  in our ldap backend
> logs (from sssd), so we did as suggested by 
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> https://access.redhat.com/solutions/2963401
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> and added max_id=4294967294 in our sssd domain config.
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> But this seems to be ignored (at least in version
> 1.15.2-50.el7_4.8.x86_64), as the queries continue to arrive in ldap.
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> Adding ldap_max_id with the same value resulted in an "numerical out
> of range" error and sssd refuses to start then (seems to be 16-bit
> ...).
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> And of course I read the nfsnobody discussions where the uid=65534 :-)
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> As a workaround, I added an entry in /etc/passwd for uid
> 4294967295 so the problem went away, but this still leaves the max_id
> and ldap_max_id issues that should be working fine ...
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> Any hints?

Sounds like https://pagure.io/SSSD/sssd/issue/3569 which was fixed upstream
in the upcoming (once we fix known regressions...) release. The fix was
also backported to RHEL-7.5 and the next RHEL-7.4.z release..
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